This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify turnkey-tomcat-13.0-wheezy-amd64-vmdk.zip.sig gpg: Signature made Wed Oct 16 10:26:11 UTC 2013 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key" For your convenience we also include file checksums: * sha1sum 3e6c183bb2f99140f6acc5128647cf4819ecf4c7 * md5sum 02c03c93feb9d1d974d3064ec8c2396e You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAABAgAGBQJSXmm3AAoJEIXCXpWhbrlNRCQIALxS/AtxWiOcj8pwSnfY9SYe NoSOEin2QFD28vb5pH+6ezTeIvrqBxYcorRThZHQR+2bxMZHyCiswdL6feVzgj5W gGrBVPIKEzc9IgT5zS5Gy/SEqugcFDHLWUq/h5YCXbd9bSZVOm/3cuQpAVWqDhmX Rmk9BMWhoTQEDvex6hC9eExmcd4kdh+ZOvekpAl/Ygs8kc7KW/2PgYTxVis378iM 4+yBjaKkMHGA4VZgAeEuajUjQYCpSyaaenYkNiCxNvES9Gz6XDHyQm4P2FfJEPoD gto1A8bF4DH6RihQeoolfGe6pfwGHaS7W0W7hSBJPM1PmPZWcTzWf6RXHc3mBCs= =kaAK -----END PGP SIGNATURE-----